Young and foolish?

From ‘Young, Wild and Free’ by Snoop Dogg & Wiz Khalifa:

So what we get drunk?
So what we smoke weed?
We’re just having fun
We don’t care who sees
So what we go out?
That’s how it’s supposed to be
Living young and wild and free

http://www.youtube.com/watch?v=Wa5B22KAkEk

The stars seem immature....is that the reason for the "dumb" or "stupid" label?

Movie 'Dumb and Dumber':